Electric welding apparatus.



A. E. BUGHENBERG. ELECTRIC WELDING APPARATUS. V APPLICATION FILED SEPT. 25, 1909. 966,382, Patented Aug.2, 1910.

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A E. BUCHENBHRG. ELECTRIC WELDING APPARATUS.

APPLICATION FILED SEPT. 25,1909

Patented Aug. 2, 1910.

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nuns, a cit fr-HTED STATES PATENT OFFICE.

ALVIN E. BUOHENBERG, OF TOLEDO. OHIO. A

SSIGNOR, BY MESN'E ASSIGNMENTS, TO

THE TOLEDO ELECTRIC WELIDER COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

ELECTRIC WELDING APPARATUS.

Specification of Letters Patent. -application filed September 25, 1909.

T a] whom it may concern:

Be it known. that I, ALvrN E. BUCHEN- of the United States, and a resident of oledo, in the county of Lucas and Statev of Ohio, have'invented a certain new and useful Electric Velding Apparatus: and It do hereby declare the followto be a full, clear, and exact description 0. the invention, such as will enable other i skilled in the art to which it appertains to make and use the same, reference being had to the accoinpanyin drawings, and to the figures of reference marked thereon, which form a part; oi this specification.

My invention relates to el metal working apparatus, and'has particular reference to what is known as double welding apparatus in .which one or a set of pieces ot metal are welded to the side of another piece at aii angle thereto, but is not restricted to such use. as the whole or the novel features of the same may be employed in any other connection for which they may be appropriate.

The object of my invention is to provide an apparatus of this class which is adapted for the welding of articles of large area, such as buggy dashes, fender irons, etc., and

. which is simple and eflicient in its operation' and strong and durable in its constructlon.

j The operation, construction and arran 'ev ment of the parts of the invention are fully described in the following specification, and a preferred embodiment thereof is illustrated in the accompanying drawings, in which,

Figure 1 is a plan view of the invention with portions broken away. Figs. 2 and 3 are side and end elevations, respectively, there-oi with portions of each broken away, and Fig. is a section on the line w a; in .Fig 2.

Referring to the drawings, 1 designates the base or frame of the machine on the top of which are mounted the normally fixed table 2 and the reciprocally movable table 3. The table 3 is capable of to and fro movetion on its guides (not shown) by set-screws 5, see Fig. l. The movements of the table 3 may be controlled in any suitable manner, as by a hell-crank lever 6, which is shown as fulcrumed to the frame top, and has the short arm thereof connected by a link 7 to the innerends of a set of toggle-links 8, 8, which have their outer ends pivotally attached to the outer end of the table 3 and to the frame top, respectively, as shown in Fig. l.

Rising from the table 2 is a standard 9 to one side of which a jaw-carrying lever 10 is pivoted, as at 11, and extends longitudinally of the frame with its free end disposed in theldirection of the table 3. This lever is shown as having its free end horizontally broadened and carries a pair of transversely spaced work-gripping jaws 12, which cooperate witha pair of subjacent jaws 13 to grip a part of the work being welded. Each of the jaws 13 is carried by one of theaterminals or leads 14, 14 of the secondary of a suitable transformer (not shown) which is customarily mounted within the frame or base 1. The terminals 14 are shown (Figs. 2 and 4) as projecting through an opening 15 in the table 2 and as being insulatingly bolted 0r screwed to the inner sides of bosses 16, 16 formed on the'top of such table. The jaw-carrying lever 10 is depressed by any suitable means, such as a cam lever 17, which is fulcrumed on a stud 18 projecting from the upper portion of the standard 9, and has its cam portion coacting with the topof the lever 10. A spring 19 acts on the lever 10 and a coacting lug 20 on the standard 9 to normally retain the free end of the lever 10 elevated. A third terminal or lead 21, having flexible connection with the secondary of the transformer, is insulatingly secured to the end of the table 3, which is adjacent the table'2, as indicated at-22, Figs-.2 aud t. and carries a work supporting jaw orpart 23 on its top. Cooperating with".this jaw to' grip the work, is an upper jaw 24, which is carried at the under side of the free end of a lever 25. This lever is pivoted, as 113 26, Fig.- 3, to a boss 27 projecting downwardly from an arm 28, which arm projects away from the inner end of the table 3 along the side of the standard 9 which is opposed to 45v gripping parts.

the. side on which the lever is disposed andhas its outer end mounted for free longitudinal sliding movements in a guide head 30, which is carriedin elevated posi- -5 tion in any suitable manner by the ,standard 9.

Projecting into a longitudinal socket-"or bore 31 in the outer end of the arm'28 and threaded into the base of such socket, is a 1!) rod 32, which has its outer end projected beyond the end of said arm through a regis-- tering aperture in an arm33, 'and carries a nut or head '34 without such arm 33 forcoacting with the outer side thereof to limit the movement of the arm 28 in the direction of the table 3.- The arm 33 projects laterally from the outer side or end of the standard 9, and in addition to serving as a stop for limiting the inward movement-,ot-the arm 28 also serves as athrust plate for'the outer end of a coiled compression-spring 35, which encircles the rod 32 andhas its inner end thrust against the base of the socket 31, see

Fig. 1. This spring acts to normally retain. the arm 28 at its limit of inward movement,

as hereinafter more fully described. The

nut or head 34- on the rod 32 is adjustable thereon to regulate the throw of the arm. 28'. The inner end of the arm 28, or that which is adjacent 'to the table 3, is laterally angled to extend over the inner end portion of the table 3 and carries a cam-lever 36, which serves to depress the jaw-carrying. lever 25;

A spring 37 projects from the innerend of the lever- 25 and co-acts with a portion 38 of the arm 28. to serve to retract the lever 25 from depressed position whenreleased by the lever 36. It is thus apparentthatby mounting the arm 28 inel'evated position 40 and extending it from above the innerend Supports or rests 39, 39 for the work are provided on the top of the machine, as indica.ted,.and carry adjustable gage blo'cks'etO; In using the apparatus, the operator clamps a piece of work, as a, between the .al reciprocatory work-support, a part (20- dies or jawsl12,-13 by. a manipulation 0t the controlling lever'17, and then clamps. the

piece of work, as Z), which is to be. welded tothe side of the piece a,'between the dies or jaws 23- 2% with its end projected toward the piece a in position to make contact with the side thereof intermediate the sets of dies 12 13 when the tables 2, 3 have relative movements toward each other. The pi'ec'es -ot workhaving been gripped between the respective work-holding parts, a heating current is passed through'the leads or terminals 14,.l i and interposed work (1,- which completes the circuit, and is permitted to flow until the piece a has been sufficiently heated to reduce it to the desired state of plasticity to facilitate a Welding of the other.

piece I) thereto. The operator now works the means controlling the movements of the table 3, which in the present instance is the lever 6, to move such table toward the table 2 and'the end of the work 6 into contact with the side of the work a, as indicated in the drawings. The secondary currentis now switched to pass through one of the heads 14, associated die 13, the contacting pieces of work a-Z), die 23, and lead 21, or vice versa, thus efl'ecting a welding together of said pieces. On a movement of the table 3 to ward itscompanion, the arm 28' is caused to have a corresponding movement within the guide-head 30 against the tension of the spring 35, due to the friction created between the work and the work-gripping parts thereof when clamped. On a release of the work clamping parts when thepieces a-b have been welded, the arm '28 actuated by the spring 35 returns toits normal extended position, with its jaw 24- disposed directly over the jaw 23 of the table '3 when such table is in retracted position, the return movement of" such arm being regulated by an adjustment of the stops 34: on the rod 32. VVhile the means for controlling the flow of the heatingcurrents through the several leads of the machine forms no part of the presentinvention, a preferable method of accomplishing this is described and claimed in United States Letters Patent No. 932,441, granted to me on August 31, 1909. I wish it understood that my invention is notllimited to any specific construction or arrangement of the parts except in so far as such limitations are specified in' the claims;

Having thus described my invention, what I claim as new and desire tos'ecure by Letters Patent, .is, V

-. 1. In an. electric metal-working apparatus, the combination of a setof clamping .dies for gripping opposed-sides of a work piece, of carrymgparts for such dies mount ed for reciprocatory movements. together and relative to each-other. v i

.2, In an.electric-metal-working apparatus,

operatingftherew-ith to clamp the'work, and

thereto.

3. In an electric metal-working apparatus, a reclp'rocatory work-support, a part cooperating therewith to clamp the work. and meanscarry ng such part and capable 0t reciprocatory movements longitudinally of theplane of movement of said work-support and'independently of said support, for the purpose described.

ments of said holders,

eeasea port to clamp work thereto.

6. In an electric metal-working apparatus, the combination with two sets of relatively movable work-holding parts, of means car- 'rying) a holding part of one of such sets and 7 means normal y capa work-holding arts and relative thereto, and

l holding said first means in one position of its movement. 1 7. In an electric metal-working apparatus, the combination with two sets of relatively movable work-holding parts, of means reciprocally carried at the side of one set of such parts and projecting past such set and to adjacent the other set and carrying one of the holding parts of said other set and yielding means normally holding said means in one position ofits movement.

8. In an electric metal-working apparatus, the combination with a movable work-holding art of a reciprocatory arm movable longitudinally of the movement of said part and relative thereto, a cooperating work-' holding part carried by said arm, and means normally retaining of its movement.

9. -In an electric metal-workinga paratus, two relatively movable sets of wor -holding parts, an arm carrying the upper holding part of one of such sets, said arm rising from the opposed side of the other 'set of work-holders, and being movable relative to lo of movements longitudinally of said each set of work-holders. 50

10. In' 'an electric metal-working apparatus, a set of movable work-holding parts, an arm carrying one of such parts and mov- 'able in the direction of movement of said' parts, and 'means normally influencing a movement of said arm'in one rdirection. v 11. In" an electric [metal-working apparatus, a, s'etiof work-holding parts, a' reciprocato'ry arm carrying 'one of: such parts, ineanslguidmg the movements of such arm, and spring means influencing the movement of said arm in one direction.

12. In an electric metal-working appa ratus, the combination with a movable worlr gripping part, of a. cooperating grippim'z one of said sets of a-ced from such support and,

said arm in one position part, and means carrying saidlatter part for yielding movements in the direction of movement of said other part. v

13. In an electric metal-working apparatus, the combination with a movable work holding part, of a cooperating ments of said parts, and means carrying said controlling means and mounted for yielding movements in the direction of movement of said movable art.

14. In an elgctric metal-workin apparatus, a work-support capable of rec procatory movements, a member mounted in advance holding-part, means for controlling the gripping move-' of one end of said support and projecting to adjacent such end, said member being capable of yielding movements in the direction of movement of the work-support, and. a

clamping part carried by such member and adapted to cooperate with said support to hold work. I

15. In an electric metal-working apparatus, the combination with a part of the work, ofthe cooperating support support for one or clamp, and means carrying the upper tus, the c'ombination with a support for one part of the work, of the cooperating relativelymovable support or clamp, and an arm bearing the -upper memb'er of said latter support and extending to the back of the first support, and means at the back of said first'support for carryings'aidann for re ciprocatory movements relative-to the last support and normally. influencing its move-' 'ments in one direction.

17. an apparatus of the class'described, the combination with a work support, of a cooperating support, a standard disposed to, the rear of onesupport,.and a part, carried :for' yielding reciproc'atory' -movements by said standardand carrying. the upper member. of the othersupport, for the purpose described. 18-. In an electric'infltal-workihg apparatus, the combination witljr two relatiwaly movable work-supportjng parts, of an arm 'carrying'th'e upper-clamping member of one of such parts, means at the rearof the other part for supporting such arm for reciprocator y movements,.sprin'gjineans influencing the Ii'novement of said armlin one direction, and; means limiting its movement in such tlii=. 'ecti'on. I

In an electric metal-workingapparae tus, the combinationwitlira movable work-. support and a cooperating upper clamp ng member, of means carrying such member and capable of movement with said support when said member is clamped to the Work, and means independent of said support for influencing a. return of said first means tov normal position when its member is released Irom the work.

In testimony whereof, I have hereunto signed. my nameito this specification in the presence of two subscribingWitnesses.

, ALVIN E. BU CHENBERG.

"Witnessesi C. \V. OWEN,

JORNEL SCHREIBER. 

